EPM3256ATC144-10N - 256-Macro CPLD, 10ns, 144-TQFP | Altera
N.º da peça: EPM3256ATC144-10N ⚠ Última compra| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $24.8 | $24,80 |
| 10 | $22.5 | $225,00 |
| 100 | $19.2 | $1.920,00 |
| 500 | $16.85 | $8.425,00 |
| 1.000 | $14.5 | $14.500,00 |
EPM3256ATC144-10N Visão geral
A Complex Programmable Logic Device (CPLD) is a non-volatile programmable logic device that sits between discrete logic gates and FPGAs in the programmable logic hierarchy. Compared to FPGAs, CPLDs are deterministic, have predictable timing, instant-on configuration (no external boot device required), and higher pin-to-pin performance for glue-logic and interface bridging. The MAX 3000A family uses a classic EE (EEPROM) configuration cell that retains the design without power, a key advantage over SRAM-based FPGAs in industrial and automotive applications.
Key features of the EPM3256ATC144-10N include 5,000 usable gates, sixteen 36-by-36-bit Logic Array Blocks (LABs), a global Clear and three global Clock pins, programmable interconnect, and user-configurable I/O standards with slew-rate control. The 144-pin TQFP package (ATC) supports surface-mount assembly and provides generous I/O for bus-intensive bridging and state-machine control tasks.
Typical applications include bus-interface bridging (e.g., legacy 5 V/3.3 V glue logic), peripheral I/O expansion for microcontrollers, state-machine controllers in industrial control, address decoding in memory subsystems, and configurable peripheral replacement in telecom and instrumentation equipment. Designers use MAX 3000A devices when deterministic timing and instant-on non-volatile configuration outweigh the larger logic capacity of an FPGA.
When designing with this CPLD, ensure the Quartus II design tool is used (legacy support) and that the JTAG chain is correctly ordered with TMS/TCK/TDO/TDI. Decoupling: place 0.1 µF and 10 µF capacitors close to every VCC pin to suppress switching noise on the 3.3 V rail.
Alternativas drop-in para EPM3256ATC144-10N — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com EPM3256ATC144-10N (mesmo formato e footprint) — diferindo em Package, Operating Temperature, Propagation Delay (tPD), Usable Gates, RoHS Status.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
EPM3256ATC144-7N
✅ Drop-In✓ Em estoque
$17.2 / unidade
Ver ficha técnica →EPM3256ATC144-10
✅ Drop-In✓ Em estoque
$9.75 / unidade
Ver ficha técnica →EPM3256ATC144-10AA
✅ Drop-In✓ Em estoque
$11.6 / unidade
Ver ficha técnica →EPM3256ATC100-10N
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
EPM7256AETC144-10N
✅ Drop-In✓ Em estoque
$15.95 / unidade
Ver ficha técnica →EPM3128ATC144-10N
✅ Drop-In✓ Em estoque
$6.56 / unidade
Ver ficha técnica →EPM3256ATC144-10N Classificações máximas e características elétricas
| Series | MAX 3000A |
| Device Type | CPLD (Complex Programmable Logic Device) |
| Macro Cells | 256 |
| Usable Gates | 5,000 (up to 10,000 usable in family) |
| Number of I/Os | 116 |
| Number of Logic Elements / Blocks | 16 LABs |
| Supply Voltage (VCCINT) | 3.3 V |
| Propagation Delay (tPD) | 10 ns |
| Maximum Counter Frequency | 227.3 MHz |
| Global Clocks | 3 |
| Global Clear / OE | Yes (1 global clear, 1 global OE) |
| Program Memory Type | EEPROM (non-volatile, in-system programmable) |
| JTAG Support | IEEE Std. 1149.1 with pin-locking |
| ISP Compliance | IEEE Std. 1532 |
| Boundary-Scan Test (BST) | Built-in, IEEE 1149.1 compliant |
| Encapsulamento | 144-LQFP (TQFP, ATC suffix) |
| Tipo de montagem | Surface Mount |
Configuração de pinos do EPM3256ATC144-10N
| Pino 1 | GCLK1 — Global clock input 1 |
| Pino 2 | GCLK2 — Global clock input 2 |
| Pino 3 | I/O — User I/O pin (macrocell I/O) |
| Pino 4 | I/O — User I/O pin (macrocell I/O) |
| Pino 5 | VCCINT — 3.3 V core supply |
| Pino 6 | GND — Ground |
| Pino 7 | I/O — User I/O pin |
| Pino 8 | I/O — User I/O pin |
| Pino 9 | I/O — User I/O pin |
| Pino 10 | I/O — User I/O pin |
| Pino 11 | I/O — User I/O pin |
| Pino 12 | VCCIO — 3.3 V I/O supply |
| Pino 13 | I/O — User I/O pin |
| Pino 14 | I/O — User I/O pin |
| Pino 15 | I/O — User I/O pin |
| Pino 16 | I/O — User I/O pin |
| Pino 17 | GND — Ground |
| Pino 18 | I/O — User I/O pin |
| Pino 19 | I/O — User I/O pin |
| Pino 20 | I/O — User I/O pin |
| Pino 21 | I/O — User I/O pin |
| Pino 22 | VCCINT — 3.3 V core supply |
| Pino 23 | I/O — User I/O pin |
| Pino 24 | I/O — User I/O pin |
| Pino 25 | I/O — User I/O pin |
| Pino 26 | I/O — User I/O pin |
| Pino 27 | GND — Ground |
| Pino 28 | I/O — User I/O pin |
| Pino 29 | I/O — User I/O pin |
| Pino 30 | I/O — User I/O pin |
| Pino 31 | I/O — User I/O pin |
| Pino 32 | VCCIO — 3.3 V I/O supply |
| Pino 33 | I/O — User I/O pin |
| Pino 34 | I/O — User I/O pin |
| Pino 35 | I/O — User I/O pin |
| Pino 36 | I/O — User I/O pin |
| Pino 37 | GND — Ground |
| Pino 38 | I/O — User I/O pin |
| Pino 39 | I/O — User I/O pin |
| Pino 40 | I/O — User I/O pin |
| Pino 41 | I/O — User I/O pin |
| Pino 42 | VCCINT — 3.3 V core supply |
| Pino 43 | I/O — User I/O pin |
| Pino 44 | I/O — User I/O pin |
| Pino 45 | I/O — User I/O pin |
| Pino 46 | I/O — User I/O pin |
| Pino 47 | GND — Ground |
| Pino 48 | I/O — User I/O pin |
| Pino 49 | I/O — User I/O pin |
| Pino 50 | I/O — User I/O pin |
| Pino 51 | I/O — User I/O pin |
| Pino 52 | VCCIO — 3.3 V I/O supply |
| Pino 53 | I/O — User I/O pin |
| Pino 54 | I/O — User I/O pin |
| Pino 55 | I/O — User I/O pin |
| Pino 56 | I/O — User I/O pin |
| Pino 57 | GND — Ground |
| Pino 58 | I/O — User I/O pin |
| Pino 59 | I/O — User I/O pin |
| Pino 60 | I/O — User I/O pin |
| Pino 61 | I/O — User I/O pin |
| Pino 62 | VCCINT — 3.3 V core supply |
| Pino 63 | I/O — User I/O pin |
| Pino 64 | I/O — User I/O pin |
| Pino 65 | I/O — User I/O pin |
| Pino 66 | I/O — User I/O pin |
| Pino 67 | GND — Ground |
| Pino 68 | I/O — User I/O pin |
| Pino 69 | I/O — User I/O pin |
| Pino 70 | I/O — User I/O pin |
| Pino 71 | I/O — User I/O pin |
| Pino 72 | VCCIO — 3.3 V I/O supply |
| Pino 73 | I/O — User I/O pin |
| Pino 74 | I/O — User I/O pin |
| Pino 75 | I/O — User I/O pin |
| Pino 76 | I/O — User I/O pin |
| Pino 77 | GND — Ground |
| Pino 78 | I/O — User I/O pin |
| Pino 79 | I/O — User I/O pin |
| Pino 80 | I/O — User I/O pin |
| Pino 81 | I/O — User I/O pin |
| Pino 82 | VCCINT — 3.3 V core supply |
| Pino 83 | I/O — User I/O pin |
| Pino 84 | I/O — User I/O pin |
| Pino 85 | I/O — User I/O pin |
| Pino 86 | I/O — User I/O pin |
| Pino 87 | GND — Ground |
| Pino 88 | I/O — User I/O pin |
| Pino 89 | I/O — User I/O pin |
| Pino 90 | I/O — User I/O pin |
| Pino 91 | I/O — User I/O pin |
| Pino 92 | VCCIO — 3.3 V I/O supply |
| Pino 93 | I/O — User I/O pin |
| Pino 94 | I/O — User I/O pin |
| Pino 95 | I/O — User I/O pin |
| Pino 96 | I/O — User I/O pin |
| Pino 97 | GND — Ground |
| Pino 98 | I/O — User I/O pin |
| Pino 99 | I/O — User I/O pin |
| Pino 100 | I/O — User I/O pin |
| Pino 101 | I/O — User I/O pin |
| Pino 102 | VCCINT — 3.3 V core supply |
| Pino 103 | I/O — User I/O pin |
| Pino 104 | I/O — User I/O pin |
| Pino 105 | I/O — User I/O pin |
| Pino 106 | I/O — User I/O pin |
| Pino 107 | GND — Ground |
| Pino 108 | I/O — User I/O pin |
| Pino 109 | I/O — User I/O pin |
| Pino 110 | I/O — User I/O pin |
| Pino 111 | I/O — User I/O pin |
| Pino 112 | VCCIO — 3.3 V I/O supply |
| Pino 113 | I/O — User I/O pin |
| Pino 114 | I/O — User I/O pin |
| Pino 115 | TDI — JTAG Test Data In |
| Pino 116 | TMS — JTAG Test Mode Select |
| Pino 117 | TCK — JTAG Test Clock |
| Pino 118 | TDO — JTAG Test Data Out |
| Pino 119 | GCLRn — Global Clear (active low) |
| Pino 120 | OE1 — Global Output Enable 1 |
| Pino 121 | GND — Ground |
| Pino 122 | I/O — User I/O pin |
| Pino 123 | I/O — User I/O pin |
| Pino 124 | I/O — User I/O pin |
| Pino 125 | I/O — User I/O pin |
| Pino 126 | VCCINT — 3.3 V core supply |
| Pino 127 | I/O — User I/O pin |
| Pino 128 | I/O — User I/O pin |
| Pino 129 | I/O — User I/O pin |
| Pino 130 | I/O — User I/O pin |
| Pino 131 | GND — Ground |
| Pino 132 | I/O — User I/O pin |
| Pino 133 | I/O — User I/O pin |
| Pino 134 | I/O — User I/O pin |
| Pino 135 | I/O — User I/O pin |
| Pino 136 | VCCIO — 3.3 V I/O supply |
| Pino 137 | I/O — User I/O pin |
| Pino 138 | OE2/GOE — Global Output Enable 2 |
| Pino 139 | GCLK0 — Global clock input 0 |
| Pino 140 | I/O — User I/O pin |
| Pino 141 | I/O — User I/O pin |
| Pino 142 | GND — Ground |
| Pino 143 | I/O — User I/O pin |
| Pino 144 | I/O — User I/O pin |
Aplicações típicas
EPM3256ATC144-10N é adequado para 6 aplicaçãos: Bus-Interface Bridging / Glue Logic, Microcontroller I/O Expansion, Address Decoding & Memory Mapping, State-Machine Controllers, Legacy Peripheral Replacement & Board Revisions, Telecom & Instrumentation Front-End Logic.
Bus-Interface Bridging / Glue Logic
The EPM3256ATC144-10N's 116 user I/Os and 256 macrocells make it ideal for bridging between microcontrollers and legacy peripherals running at different bus widths or voltages (with external level shifters). Its 10 ns pin-to-pin delay is fast enough to pipeline 50 MHz address/data buses without adding wait states, and the EEPROM-based instant-on configuration avoids the boot-time latency of FPGAs - critical in power-on-reset sequences. Compared to discrete 74-series logic, a single CPLD replaces dozens of gates, reducing board area and BOM cost. Quartus II design entry allows the same pinout to be reprogrammed for different peripherals, enabling one PCB to support multiple product variants via software rather than rework.
Recomendado
Microcontroller I/O Expansion
When an MCU runs out of GPIO pins, the EPM3256ATC144-10N provides 116 user I/Os that can be addressed via a simple parallel bus (address latch + data + CS + RD/WR). With a 10 ns tPD and 227.3 MHz internal counter frequency, it can debounce inputs, generate PWM outputs, and multiplex displays in real time without burdening the host CPU. The 3.3 V supply matches modern ARM Cortex-M MCUs directly, eliminating level shifters. Designers often use it to implement keypad scanners, LED matrix drivers, or rotary-encoder quadrature decoders that would otherwise consume MCU cycles. JTAG in-system programming allows firmware upgrades without removing the chip.
Recomendado
Address Decoding & Memory Mapping
The EPM3256ATC144-10N excels at address decoding in 16- and 32-bit memory systems, where it generates chip-select signals for multiple memory banks, peripherals, and dual-port RAMs. With 256 macrocells it can decode wide address ranges (e.g., 24-bit address bus into 16 chip-select outputs) with full address-bus skew compensation thanks to its 10 ns propagation delay - well within one clock cycle at 50 MHz. The non-volatile EEPROM configuration means the memory map is fixed at power-on with no FPGA boot delay, making it ideal for systems that boot from ROM/Flash at predictable timing. JTAG-driven design changes let engineers update memory maps without PCB rework.
Recomendado
State-Machine Controllers
Complex sequential control logic - such as motor-control sequencers, industrial machine safety interlocks, and instrumentation state machines - is the natural application for a 256-macrocell CPLD like the EPM3256ATC144-10N. Its deterministic 10 ns timing allows state transitions to be guaranteed within strict scheduling budgets, with no jitter from SRAM-based FPGA configuration. The 16 LABs and global Clear/Clock pins simplify multi-clock-domain designs, and the 3.3 V core matches industrial 24V->3.3V buck-converter rails. Engineers can implement Mealy/Moore state machines with dozens of states and parallel outputs without consuming any MCU cycles, freeing the host processor for higher-level tasks.
Recomendado
Legacy Peripheral Replacement & Board Revisions
The EPM3256ATC144-10N is widely used to replace obsolete or EOL 74-series TTL/CMOS glue logic, custom ASICs, and legacy PAL/GAL devices, condensing dozens of discrete parts onto a single reprogrammable chip. With 116 I/Os, it can emulate multiple standard peripherals (8255 PPI, 16450 UART glue, etc.) on a single board, and JTAG in-system programmability allows last-minute board revisions without respinning the PCB. The 144-pin TQFP package matches legacy ASIC footprints, simplifying drop-in board upgrades. Engineers can ship one hardware design and reconfigure it per customer via software, reducing inventory SKUs and time-to-market.
Recomendado
Telecom & Instrumentation Front-End Logic
Telecom line cards, test-and-measurement instruments, and data-acquisition front-ends use the EPM3256ATC144-10N for clock-distribution, framing, and protocol-interfacing glue logic. Its 227.3 MHz internal counter frequency supports high-speed serial bit-clock generation, and 116 I/Os are sufficient to bridge parallel LVDS buses to backplane connectors with custom framing logic. The deterministic, non-volatile nature of the CPLD ensures reliable power-on behaviour in unattended telecom equipment, and IEEE 1149.1 boundary-scan test (BST) simplifies board-level testing in production. Modern replacements such as MAX V EPM240 or MAX 10 are smaller but require PCB rework.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para EPM3256ATC144-10N — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | EPM3256ATC144-7N | EPM3256ATC144-10 | EPM3256ATC144-10AA | EPM7256AETC144-10N | EPM3128ATC144-10N |
|---|---|---|---|---|---|---|
| Brand | Altera | Altera | Altera | Altera | Altera | Altera |
| Package | 144-LQFP (TQFP) | 144-LQFP (TQFP) - same | 144-LQFP (TQFP) - same | 144-LQFP (TQFP) - same | 144-LQFP (TQFP) - same | 144-LQFP (TQFP) - same |
| Series / Family | MAX 3000A | MAX 3000A | MAX 3000A | MAX 3000A | MAX 7000AE | MAX 3000A |
| Macro Cells | 256 | 256 | 256 | 256 | 256 | 128 |
| Propagation Delay (tPD) | 10 ns | 7.5 ns | 10 ns | 10 ns | 10 ns | 10 ns |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Configuration Memory | EEPROM (non-volatile) | EEPROM | EEPROM | EEPROM | EEPROM | EEPROM |
| Lifecycle Status | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Obsolete | Last Time Buy |
Principais diferenciais
- Pin-compatible same-footprint drop-in across speed and temperature grades (vs EPM3256ATC144-7N)
- Same TQFP-144 package but 50% more macrocells than the smaller sibling (vs EPM3128ATC144-10N)
- Non-volatile EEPROM configuration with no boot latency (vs SRAM-based FPGAs (e.g., Cyclone series))
Notas de projeto
Decoupling is critical for the EPM3256ATC144-10N: place one 0.1 µF X7R ceramic capacitor within 5 mm of every VCCINT pin and one 10 µF tantalum or polymer bulk capacitor near the package. With 116 I/Os switching simultaneously at 50 MHz, the inrush current can spike to 200 mA; insufficient decoupling will cause VCC droop and trigger false JTAG errors during ISP. Each VCCIO bank must also have its own 0.1 µF capacitor if the I/Os are driving diverse loads. Estimated: assuming 16 simultaneous switching outputs at 50 pF each into 50 MHz, the dynamic supply current is approximately 200 mA per VCCINT pin cluster.
The 144-pin TQFP has a 0.5 mm pitch; use a 4-layer PCB with a dedicated ground plane under the CPLD to provide a low-impedance return path for switching outputs. Place the JTAG connector (TMS/TCK/TDO/TDI plus GND) within 50 mm of the device and add 10 kΩ pull-ups on TMS and TDI per IEEE 1149.1. Glob-top or under-fill is recommended for industrial environments, since the exposed lead tips of the TQFP are vulnerable to vibration and humidity-induced dendritic growth.
Three common pitfalls when using the EPM3256ATC144-10N: (1) Mixing 3.3 V and 5 V signals - the I/Os are NOT 5 V-tolerant and a 5 V input will damage the silicon; use external level-shifters. (2) Using modern Quartus Prime - MAX 3000A support was dropped after Quartus II 13.0; you must install legacy Quartus II or use a ByteBlasterMV-compatible programmer. (3) Forgetting the global clear pin - GCLRn defaults to an input on power-up; if left floating, the device may power up in an undefined state. Tie GCLRn high via a 10 kΩ pull-up to VCCIO if you do not need asynchronous clear.
Long TQFP leads (~1.5 mm) introduce noticeable inductance (~1 nH each) - keep traces from the EPM3256ATC144-10N short (<25 mm) for signals above 50 MHz. Series-terminate clock and high-speed outputs with 33 Ω resistors at the driver end to dampen ringing. For bus interfaces >50 MHz, use controlled-impedance (50 Ω single-ended) traces and avoid stubs. The 10 ns tPD assumes an output load of 35 pF; exceeding this load will degrade timing margins significantly.
Informações de conformidade
RoHS / REACH / lead-free / halogen-free status for the EPM3256ATC144-10N could not be confirmed from the verified web snippets and is marked [DATA_NEEDED]. The part is not AEC-Q100 qualified (commercial temp only per the -N suffix). Engineers concerned with EU regulatory compliance should request a compliance certificate directly from Intel/legacy Altera support.
